feat: link commits, branches and pull requests to tickets

A project can turn on a webhook for GitHub, Gitea or GitLab. Pushes and
pull or merge requests that name a ticket key show on that ticket under
Desarrollo, with the state of each pull request; the secret is shown and
rotated from the project settings.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libs/web/tracker/domain/src/lib/ports/gateways.ts

@@ -5,6 +5,7 @@ import {
   BoardColumn,
   Comment,
   Epic,
+  GitIntegration,
   SavedFilter,
   Sprint,
   SprintBurndown,
@@ -130,6 +131,14 @@ export abstract class IssuesGateway {
   ): Observable<CommandResult>;
 }
 
+/** The project's Git webhook (owners and admins configure it). */
+export abstract class GitGateway {
+  abstract integration(projectId: string): Observable<GitIntegration>;
+  /** On with a new secret (also to rotate it). */
+  abstract enable(projectId: string): Observable<GitIntegration>;
+  abstract disable(projectId: string): Observable<void>;
+}
+
 /** Saved views of a project's board (mine and the shared ones). */
 export abstract class SavedFiltersGateway {
   abstract list(projectId: string): Observable<SavedFilter[]>;